This page provides graphs that represent crucial features of the sound discussed, and links to the downloadable sound files.

Figure 2 Hand-painted spectrograms of the syllables
ba, da, ga.
The ba--da--ga pitch continuum of F2 is
divided into 14 steps instead of three.
The two parallel
regions of black indicate regions of energy concentration,
F1 and F2.
Notice that the onset frequency of F2 of
da is higher than that of ba;
and the onset frequency
of F2 of ga is higher than that of da.

I wish to illustrate these two modes of listening through two series of sound stimuli from an unpublished demo tape by Terry Halwes. Listen to the series in figure 2, and see whether you hear the change from [ba] to [da], from [da] to [ga] occur suddenly.